Road-scarifier.



E. WRIGHT.

ROAD SGARIFIER.

APPLIOATION FILED June, 1910.

Patented M51127, 1911.

2 SHEETS-SHEET 1.

mlllllli E. WRIGHT.

ROAD SGARIFIER.

APPLICATION TILED JUNEQ, 1910. 986, 1 1 3, Patented Mar. 7, 1911.

' 2 SHEETS*SHEET 2.

am ne/who e nnwanio wnren'r, or BROOKLYN, new YORK.

ROAD- SCARIFIEB.

$pecification of Letters Patent.

Patented Mar. 7, 1911.

Application filed June .9, 1910. Serial No. 565,941.

To all whom it may concern:

Be it known that I, EDWARD WRIGHT, a subject of the King of Great Britain, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Road- Scarifiers, of which the fpllowing is a specification. I

This invention -.comprises an improved form of road scarifier, the details and advantages of which will be pointed out inthe following specification taken in connection with the accompanying drawing, in which,

Figure 1 is a side elevation of the scarifier; Fig. 2 is a top planview of the same;'

3 is a central vertical section throu h the same taken transversely ,of the sha t;

and, Fig. 4 is a front elevation of the machine. I

R ferring to the drawin land 2 indicate suita 'le supporting whee s which carry a shaft 3, the main portion of which shaft, between the wheels, is rectangular in crosssection. Secured to this .shaft by bolts 4, one of which is shown in Fig. 3, is 'a. heavy metal body A, of segmental form, carrying two sets of picks 5 and 6, respectively, one set of picks being arranged substantially at right angles to the other. The body A, which is cast in one piece, comprises two fiat walls 7 and 8 arranged at right angles to one another-and connected at their meeting ends by a short diagonal wall 9 through which the bolts 4 extend to connect the body with the axle. The walls 7 and 8 arealike, each being of T-shape, asshown in Fig. 4, the inner portions of-the walls extending between thewheels while the outer portions 7 and 8 project laterally over the peripheries of the wheels and are thickened, as shown in Fig.

3, to form heavy and substantial transverse bars to receive the picks 5 and 6. These bars are provided with suitable tapering openings into which the picks are driven. The walls. 7 and 8 are connected by side walls 9 and 10, and a wall 11, concentric with the axis of the-shaft, connects the walls 7, 8, 9 and 10, forming-an inclosure a, which serves the purpose of a tool box, or a box for holding picks. The wall 11- has an opening 12 and a suitable cover (not shown) may be connected to lugs 13 on the wall 11 for closing the tool box. The bars .7 and 8 are con nected by a series of curved ribs 14.

As the heavy metal body A is secured'to the shaft 3 at some distance from the center.

cal plane of t pull of the traction engine exerted through 5 of mass of said body, a large part of the weight of the body will rest upon one or the other set of picks according to whether the.

body is in the position shown in Figs. 1 and 3 or whether the body is turned about the shaft 3 as an axis until the picks 6 engage the ground.

The draw bar Bhas arms 15 journaled upon the ends of the shaft 3 and this draw bar may be swung about the shaft from the position shown in Fig. l to that shown in Fig." 3 when it is desired to reverse the di-' rection of movement of the scarifier. \Vhen the scarifier is moving in the direction of the Flg. 1, the picks .5 will engage the arrow,

ground and the draw bar will be in t e position shown. When it is desired to reverse the movement, the body A will be swung about the shaft as a center, until the"center" of mass of the body passes the vertical plane of the shaft, when the body willdro heavily on the other side of the shaft and rive the picks 6' into the ground. Thedraw bar is then swung'over the body and attached to 30 the traction engine or other motive ower and the scarifier pulled in the opposite direction. The bod may be tilted over thejverti lie shaft'manually, or by the a chain thrown over the rear ends of one or more of the uppermost picks. (Vhen the cha n is used, it will slip off of the picks after the bod has been tilted. Stops 16, in-

tegral with-t e walls 7 and 8, are provided so for the purpose of limiting the depth to Which the picks penetrate when the body is. thrown over the center and also to limit the depth of penetration when the scarifierris in operation. These stops, as shown, are pro jections from the walls and 8, the outer surfaces of such projections being rounded or semi-cylmdrical in sections taken transversely of the machine, the purpose of this rounding of the stop being to permit the scarifiertoturn at an angle to a straight course without having the stop dig into the ground. In transporting the sca-frifier from place to place, the lower icks may be removed and the body will tien be supported upon the adjacent stop and will travel with little friction and without tearing up the g ou d The picks aredouble ended and f0ur-cornered, and the openings in the bars are formed. to' receive either end of a pick and present one corner of the pick to the roadway as a cutting edge. By reversing and rotating the picks, eight cutting edges on each rangement of the pick supporting bars at I approximately 90 degrees apart permits of the ready removal'or insertion of picks in the bar-which may be at any time in the.ver-

tical position.

1 What I claim is: I

1. A road scarifier, comprising a metal body, ,wheel-supported means for pivotally supporting the body upon a horizontal axis at one side of.a vertical line passing through its center of mass, so that said body is normally unbalanced upon the shaft, a set of picks carried by said body and adapted to engage the ground when its center ofmass is at one side of said horizontal axis, and another set of picks carried by said body'and adapted to engage the ground when its center of mass is at the opposite side of said horizontal axis. 2. A road scarifier comprising. a wheelsupported shaft or axle, a metal body con: nected, atone side of a vertical line passing through its center of mass, to said shaft and mounted thereon so that it may be tilted over the shaft from one side to the other, and picks carried by said body for engaging the ground when the center of mass of the body is at one side or the other of the shaft.

3. A road scarifier comprising a wheelsupported shaft or axle, a metal body con neoted at one side of a vertical line passing through its center of mass, to said shaft, so

that said body is normally unbalanced on said shaft, said body having two sets of picks arranged at right angles to one another.

4. A road scarifier comprising a Wheelsupported shaft or axle, a metal body connected at one side of its center of mass to said shaft and having pick-supporting bars arranged approximately ninety degrees 50 apart with respect to the axis of said shaft.

5. A road scarifier comprising a wheelsupported shaft or axle, a metal body having two walls or arms arranged substantially at right angles to one another and connected to said axle adjacent to their meeting points, and picks carried by each of said walls.

that the scarifier, as a 6. A road scarifier comprising a wheelsupported shaft or axle, a metal body connected at one side of its center of mass" to said shaft and having bars or arms for supporting two sets of p1cks,'and stops project ing from thebody adjacent to said bars, adapted to limit the penetration of the picks and to rest upon the ground when the picksare removed;

7 A road scarifier comprising a Wheelsupported shaft or axle, a metal body having pick-supporting bars arranged approxi mately ninety degrees apart with respectto said axle and stops on said body adjacent to thepicks for limiting the penetration of the picks.

8. A road scarifier comprising a wheelsupported shaft or axle, a metal body having pick-supporting bars arranged approximately ninety degrees apart with respect to said axle, and stops on said body adjacent to the picks for limiting the penetrationof the picks, said stops having rounded outer surfaces. v r 9. A road scarifier comprising a wheelsupported shaft or axle, a metal body having two walls extendlng transversely of the machine and arranged at an angle to one another and connected to the axle adjacent to their meeting points, picks at the outer another and connected to -the axleadjacent to their meeting points picks at the outer ends ofv said' walls, side walls connecting,

with said transverse walls and a wall connecting said transverse and side walls, said latter wall having 'a doorway or opening therein.

11. A road scarifier comprising a wheelsupported shaft, a metal body connected at one side of its center of mass to said shaft and having two sets of picks arranged at anglesto one another, and a draw bar havmg arms journaled upon the shaft.

. In testimony whereof I aflix my signature, in presence of two witnesses.

EDWARD WRIGHT.

Witnesses W. M. LYMAN, SIDNEY WRIGHT.

Copies of this patent may. be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

